02/10/21

A salt solution is made by mixing 2.76lbs of salt and 92.5 lbs of water. What is the mass percent of the salt in the solution?
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02/10/21

Colligative properties depend on the... (choose all that apply)
options are : mole fraction of the non-volatile solute Composition of solute particles Particle size of the non-volatile solute molar mass of the non-volatile solute none of the above
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02/10/21

How many argon atoms are contained

How many argon atoms are contained in 7.2 x 10-15 mmol of argon?
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02/10/21

Chemistry ideal gas law help
Calculate the mass of 45L of oxygen gas (O2) having a pressure of 2.43 atm at a temperature of 55oC.
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02/10/21

Chemistry hw help Ideal gas
Calculate the pressure of a gas having a density of 2.20g/L at 289K having a molar mass of 32g/mol
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02/10/21

the dominant bond
What is the dominating bond between water and acetone?
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02/10/21

Chemistry Hw help ideal gas
Calculate the temperature of H2O vapor at a pressure of 340KPa if it has a density of 2.3g/L.Calculate the molar mass of a gas having a mass of 5.67g at a pressure of 45mmHg, volume of 29L and... more
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02/10/21

Solid Co(NH3)(OH)3 is placed in a sealed container and held at a constant temperature of 600.00°C where Kc = 32.0 for the following reaction:
Calculate Kp for this reaction at 600.00°C. 
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02/10/21

An empty 2 Liter flask is filled with: 1.705 atm of CO(g), 0.900 atm of COBr2(g), and 1.895 atm of Br2(g), at 260°C and allowed to reach equilibrium according to the reaction:

COBr2(g) ⇄ CO(g) + Br2(g) Kp = 0.289 at 260°C Calculate the value of Q and determine which direction this reaction will proceed to reach equilibrium.
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02/10/21

Calculate the equilibrium constant at 25°C for the reaction: 4 Fe(CN)3(s) + 3 Cd^2+(aq) ⇄ 3 Cd(CN)4^2¯ (aq) + 4 Fe^3+(aq)

Using the following information: Fe(CN)3(s) ⇄ Fe3+(aq) + 3 CN¯(aq) K = 4.8×10-39 (at 25°C) Cd2+(aq) + 4 CN¯(aq) ⇄ Cd(CN)42¯ (aq) Kc = 3.0 1018 (at 25°C)
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02/10/21

A completely empty 2.00 L reaction vessel is filled with ammonia gas (NH3) at a constant temperature of 611K. The initial partial pressure of NH3 was 6.40 atm.

With time it partially decomposed according to the reaction below until equilibrium was reached:     At equilibrium, the total pressure inside the flask was 9.40 atm. What is the numerical value of... more
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02/10/21

A metal, M , of atomic mass 56 amu reacts with chlorine to form a salt that can be represented as MClx.
A boiling point elevation experiment is performed to determine the subscript 𝑥 , and therefore, the formula of the salt. A 39.0 g sample of the salt is dissolved in 100.0 g of water and... more
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02/10/21

Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6.
At 25 ∘C, the vapor pressure of pure benzene is 100.84 Torr. What is the vapor pressure of a solution made from dissolving 19.7 g of biphenyl in 30.3 g of benzene?
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02/09/21

A) Write an equation to relate the rate of consumption of hydrogen to the rate of formation of hydrogen chloride.
Hydrogen reacts with chloride according to the following balanced equation: H2 +Cl2→2HCl.B) Suppose the rate of consumption of hydrogen in this reaction is 5.9x104 M/s. Calculate the corresponding... more
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02/09/21

uv spectroscopy lab
Obtain solutions of the following dyes in water at the given weights per liter: Quinoline yellow (13 mg), Methylene blue (2.5 mg), Phenolphthalein indicator solution (pink when pH>9). As part of... more
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02/09/21

Chemistry Hw Ideal gas law
calculate the density of N2 gas at a pressure of 1.25atm and a temperature of 43C
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02/09/21

2 moles of Sodium sulfate is reacted with 3 moles of calcium chloride.  
2 moles of Sodium sulfate is reacted with 3 moles of calcium chloride.   Write a balanced chemical equation, including states of all reactants and products. Write a net ionic equation. Determine... more
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02/09/21

1. Draw and label the heat curve for water with its specific melting and boiling point.

1. Draw and label the heat curve for water with its specific melting and boiling point. Identify how many and which equations would be needed to start with liquid water at 21oC and turn it into... more
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02/09/21

Please help with chemistry question
Calcium chloride (aq) reacts with sodium carbonate (aq) to from solid calcium carbonate and aqueous sodium chloride. Determine the volume of a 2.00 M Calcium chloride solution would be needed to... more
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02/09/21

How many moles of lead(II) hydroxide (solid) can be formed when 0.0225L of 0.135 M Pb(NO3)2 solution reacts with excess sodium hydroxide?

How many moles of lead(II) hydroxide (solid) can be formed when 0.0225L of 0.135 M Pb(NO3)2 solution reacts with excess sodium hydroxide?
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02/09/21

How would you write an equation to this?
I had to take a test and had to write out a word equation to this formula. I can”t remember what equation I answered with but I would like to know what the answer is. 2Al(s) + 6 HCl(aq) ⇒ 2 AlCl3... more
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02/09/21

The mass percent of Cl− in a seawater sample is determined by titrating 25.00 mL of seawater with AgNO3 solution, causing a precipitation reaction....
An indicator is used to detect the endpoint, which occurs when a free Ag+ ion is present in a solution after all the Cl− has reacted. If 57.50 mL of 0.2036 M AgNO3 is required to reach the... more
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02/09/21

What is the molality of ions in a 0.593 m solution of SrCl₂ assuming the compound dissociates completely?
What is the molality of ions in a 0.593 m solution of SrCl₂ assuming the compound dissociates completely?
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02/09/21

need the answer
A mystery element, called Caveraticum by its discoverers, exists on Earth as a mixture of two isotopes. The most abundant isotope (75.76%) has a mass of 34.9689 amu; the other isotope (24.24%) has... more
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02/09/21

What is the molality of ions in a 0.593 m solution of SrCl₂ assuming the compound dissociates completely?
What is the molality of ions in a 0.593 m solution of SrCl₂ assuming the compound dissociates completely?
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